Hello and welcome to Healthcare Magic. Thanks for your query. Masturbation is considered as a part of normal human sexual behaviour and is very common in males of your age group. Masturbation does not cause any ill effects on sexual health and does not lead to any other adverse health consequences. So, you needn t worry about this. Premature ejaculation can be due to different causes - both psychological causes and medical causes. But in a young person, it is more likely due to a psychological cause such as anxiety. To increase the ejaculation time, you can try practicing certain exercises like Kegel s exercises or techniques like the Masters and Johnson technique. Alternatively, there are medication available which can help delay ejaculation time. So, if this problem is very distressing, I would suggest that you consult a Sexologist for further help and treatment. Regarding your other problem of twisted penis, this could be due to a problem called Peyronie s disease. For this you need to consult a surgeon to discuss about treatment options. Wish you all the best. Regards, Dr. Jonas Sundarakumar MBBS., DPM., MRCPsych.(U.K.) Consultant Psychiatrist